condition mean min max ZT0-3 78.636375 50.55975 106.713 ZT4-7 6.50262 6.50262 6.50262 ZT8-11 4.230565 4.230565 4.230565 ZT12-15 0 0 0 ZT16-19 0.84311 0.84311 0.84311 ZT20-23 4.552615 4.552615 4.552615